Membership

In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.

ACI MEMBERSHIP

The American Concrete Institute

Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.

ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

Abstract:The problem of evaluation of displacement components (deflections or rotations) including the effects of creep and shrinkage of concrete and relaxation of steel is closely related to the problem of calculation of prestress losses. This paper presents an accurate design method using a chart for the caluclation of the prestress loss, the axial strain, and the curvature at any section of a prestressed concrete frame. . .The method presented in this paper can be used for any framed structure; its application to the case frequently met in practice of a simple beam is demonstrated.